@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&family=Poppins:wght@600&display=swap');

body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #0a2c5f, #1e4b8c);
    color: #fff;
    line-height: 1.6;
    overflow-x: hidden;
}

header {
    position: relative;
    height: 100vh;
    background: radial-gradient(circle, rgba(0, 0, 0, 0.3), transparent),
                url('https://images.gptkong.com/demo/sample1.png') no-repeat center/cover;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1), transparent);
    animation: aurora-move 15s linear infinite;
    transform-origin: 50% 50%;
}

@keyframes aurora-move {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

header h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 4rem;
    text-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    z-index: 1;
}

.card-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    padding: 20px;
    gap: 20px;
}

.card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 20px;
    width: calc(33.33% - 40px);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.2);
}

.card img {
    width: 100%;
    border-radius: 10px;
    margin-bottom: 15px;
}

@media (max-width: 1024px) {
    .card {
        width: calc(50% - 40px);
    }
}

@media (max-width: 768px) {
    .card {
        width: 100%;
    }

    header h1 {
        font-size: 3rem;
    }
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

table th, table td {
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 10px;
    text-align: left;
}

pre {
    background: rgba(0, 0, 0, 0.2);
    padding: 15px;
    border-radius: 10px;
    overflow-x: auto;
}

code {
    color: #ff9800;
    font-family: 'Courier New', monospace;
}

footer {
    text-align: center;
    padding: 20px;
    background: rgba(0, 0, 0, 0.2);
    font-size: 0.9rem;
}